Refactor Udev device support in Ozone and add a DRM hotplug monitor

ui/events/ozone/device/device_manager.cc

Index: ui/events/ozone/device/device_manager.cc
diff --git a/ui/events/ozone/device/device_manager.cc b/ui/events/ozone/device/device_manager.cc
new file mode 100644
index 0000000000000000000000000000000000000000..cd60d9d5603ba7ad9018843ac8d0b6cb9f410d49
--- /dev/null
+++ b/ui/events/ozone/device/device_manager.cc
@@ -0,0 +1,20 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ui/events/ozone/device/device_manager.h"
+
+#include "ui/events/ozone/device/device_manager_manual.h"
+#include "ui/events/ozone/device/udev/device_manager_udev.h"
+
+namespace ui {
+
+scoped_ptr<DeviceManager> CreateDeviceManager() {
+#if defined(USE_UDEV)
+  return scoped_ptr<DeviceManager>(new DeviceManagerUdev());
+#else
+  return scoped_ptr<DeviceManager>(new DeviceManagerManual());
+#endif
+}
+
+}  // namespace ui